hm
hm — 縮寫
1. a written abbreviation for 'hectometre' or 'hectometer': a metric unit of length
公引
公制長度單位，等於100公尺
a written abbreviation for 'hectometre' or 'hectometer': a metric unit of length equal to 100 metres, written as 'hm' after a number.
The survey marker showed the elevation as 45 hm above sea level.
測量標記顯示海拔高度為 45 hm。
abbreviation used in surveying / mapping
According to the map, the river is roughly 3 hm wide at this bend.
根據地圖，這條河在此彎道處約有 3 hm 寬。
The team measured the length of the running track at 4 hm.
團隊測量出這條跑道的長度為 4 hm。
The distance between the two villages on the old map was given as 12 hm.
舊地圖上兩個村莊之間的距離標示為 12 hm。
用法筆記
This abbreviation appears mainly in technical written contexts such as surveying, cartography, and scientific reports. In everyday spoken English, speakers usually say '100 metres' or '0.1 kilometres' instead of 'one hectometre'.